A car with a mass of 1.1 × 103 kilograms hits a stationary truck with a mass of 2.3 × 103 kilograms from the rear end. The initial velocity of the car is +22.0 meters/second. After the collision the velocity of the car is -11.0 meters/second. What is the velocity of the truck after this elastic collision?

Question

jfraser · Answer

use conservation of momentum: $$mass_{car}*V_1{car} + mass_{truck}*V_1{truck} =  mass_{car}*V_2{car} + mass_{truck}*V_2{truck}$$ You have all the pieces except the final velocity of the truck

ltb · Answer

@jfraser i got 14.24 is that correct?

jfraser · Answer

I haven't done the math out yet, but it sounds reasonable